Yarn or thread twister



Sept. 26,, 1950 e. H. SNIDER 2,523,338

YARN OR THREAD TWISTER Filed March 24, 1948 Patented Sept. 26, 1950UNITED STATES PATENT OFFICE YARN OR THREAD TWISTER Gilbert H. Snider,Pulaski, Va.

Application March 24, 1948, Serial No. 16,791

1 Claim. 1

This invention relates to devices for false twisting fibres into cordsor the like, and more particularly to a small device that is adapted formounting directly on spinning machines and false twisting filaments orfine strands into yarn or thread.

The presently employed twisting machines are too large and cumbersome tobe applied directly to the spinning machines in a mill. Consequently,the filaments must be passed from the spinning machine to a twistinapparatus. This requires undesirable handling and equipment and,furthermore, the equipment is costly and inefficient.

Having in mind the defects of the prior art apparatus, it is an objectof the present invention to provide a small false twisting device thatis capable of n o uptin cmagspinning machine to directly receive andfalse twist the filaments produced thereby.

It is another object of the invention to provide a yarn or threadedfalse twisting device that has simplicity of design, economy ofconstruction and efficiency of operation.

The foregoing objects and others ancillary thereto are preferablyaccomplished, in accordance with a preferred embodiment of theinvention, by a pair of slightly conical discs which are positioned withone portion of their conical faces in parallelism and are driven inopposite directions. The faces of the discs are preferably covered witha soft material, such as felt, that will grip but not damage thefilaments during the twisting operation. The filaments are feddiametrically between the parallel portions of the discs so that theyare engaged by the facings of the discs and twisted by the oppositemovement of the discs.

The novel features that are considered characteristic of the inventionare set forth with particularity in the appended claim. The inventionitself, however, both as to its organization and its method ofoperation, together with additional objects and advantages thereof, willbest be understood from the following description of a specificembodiment when read in connection with the accompanying drawing,wherein like reference characters indicate like parts throughout and inwhich:

Figure 1 is a plan view of a false twisting device according to theinvention;

Figure 2 is an end view in elevation of the device;

Figure 3 is a cross-sectional view taken on line 33 of Figure 1 andshowing the face of one of the twisting discs in elevation; and

Figure 4 is a cross-sectional view taken diametrically through one ofthe twisting discs.

Referring to the drawing, specifically to Fig. l, a false twistingdevice, according to the present invention, comprises a pair of discs I0and I0 which are substantially identical in size and shape. These discshave slightly conical faces I I and I I which, preferably, have facingsI2 and I2 of a soft, matte material such as felt or the like. Thefacings I2 and I2 need not completely cover the faces I I and I I but,preferably, as best shown in Figs. 3 and 4, are in the form of ringswhose outer peripheries coincide with the peripheries of the discs IE3and Ill.

The discs ID and I0 are respectively fixed on shafts I3 and I 3 whichare journalled in bearing blocks I4 and I4 that are mounted on a baseI5. The shafts i3 and I3 are driven in opposite directions and at thesame rate of speed. This may be accomplished in any desired manner andone form may comprise, as best shown in Fig. 1, a motor I6 for drivingone shaft, such as shaft I3, and means for transmitting and reversingthe drive from the one shaft to the other. In this form the directlydriven shaft I3 may comprise the shaft of the motor I6. Obviously, eachof the shafts I3 and I3 may be driven by a separate motor, the twomotors being synchronized to drive their respective shafts at the samerate of speed.

According to the drive shown in the drawings, pulleys I1 and I1 arerespectively mounted on the shafts I3 and I3. These pulleys I! and IIare connected by belts I8 and I8 respectively, with pulleys I9 and I9mounted on a transmission shaft 20 which extends longitudinally of thebase I5 and is journalled in bearing blocks 2I mounted on said base l5.One of the belts, as the belt I8, is crossed over in order to reversethe direction of the drive.

In View of the foregoing description, it will be seen that the motor IEwill drive the shaft I3 and, consequently, the disc Ill and pulley IT.The belt I8 will be driven by the pulley IT and, in turn, will drive thepulley I9 and shaft 20. The pulley I9 is driven with the shaft 20 anddrives the belt I8 which drives the pulley I1 and, consequently, theshaft I3 and disc I0.

As the belt I8 is crossed over, the disc ID will be driven in theopposite direction to that of the disc I0. Furthermore, as the pulleysI1 and H are of the same size, and the pulleys I9 and I9 are of the samesize,'the two discs I0 and III will be driven at the same rate of speed.

The bearings l4 and [4' are so positioned on the base l5 that the discsl0 and I0 will have a corresponding portion of their conical faces H andII arranged in parallelism. In addition, the discs I!) and [0' aredisposed so that the surfaces of the facings l2 and 12' are almost, outnot quite, in contact.

The apparatus is then ready for operation, and filaments F, or the like,may be fed diametrically between the discs l0 and ID to pass between andin contact with the closely adjacent parallel portions of the facings l2and I2.

As the filaments F are contacted by the rapidly, oppositely movingfacings I2 and I2 they are false twisted into a thread T. The facings l2and I2 being of a soft matte material will not harm the filaments norpermit slippage therebetween.

In order to position the filaments F and false twisted thread Tdiametrically of the discs and I0, idler guide rollers 22 and 23 may bejournalled in bearings 24 and 25 which may be mounted on the base 15.The roller 22 may be adapted to accommodate the filaments F and theroller 23 may be in the form of a pulley to ac commodate the thread T.These rollers 22 and 23 may be positioned on opposite sides of the discs10 and II! with their contacting surfaces in a plane that is diametricalof said discs. Obviously, these guide rollers 22 and 23 may be dispensedwith in favor of other guide means or in the event that the spinningmachine, on which the device may be mounted, is provided with suitableguide means.

It will be evident that the present invention provides a small compactapparatus of high efficiency that may be mounted directly on a spinningmachine. Consequently, as the filaments are supplied by the spinningmachine, they may be fed directly to the present false twistingapparatus and be immediately false twisted into yarn, thread or thelike. While the present invention is most advantageous in use for falsetwisting thread or yarn, it is contemplated that it may also be adaptedfor false twisting heavier strands into cordage or the like.

Although a certain specific embodiment of the invention has been shownand described, it is obvious that many modifications thereof arepossible. The invention, therefore, is not to be restricted exceptinsofar as is necessitated by the prior art and by the spirit of theappended claim.

What is claimed as new, is:

A false twisting device, comprising a pair of discs, each having aslightly conical face, an annular member of soft matte material securedto each conical face and covering the peripheral portions thereof withthe outer surface forming a relatively narrow thread engaging surfacespaced outwardly from the conical face to preclude contact between theconical face and strands engaged by the member surface, means rotatablysupporting said discs with their conical faces toward each other, saiddiscs being disposed on angularly arranged axes to position a radialportion of their conical faces in parallelism and with the strandengaging surfaces of their respective annular members closely spaced tooppositely engage threads or strands therebetween, means diametricallyadjacent the peripheries of said discs and aligned with the radiallyparallel faces for guiding a plurality of strands diametrically betweenthe angularly spaced peripheral portions of said discs and the twistedthread from the parallelly adjacent peripheral portions of said discswith the strands passing between the closely spaced parallel surfaces ofthe annular members, and means for driving the said discs in oppositedirections and at substantially the same rate of speed to twist thestrands into yarn or thread.

GILBERT H. SNIDER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

